MACHINE TROUBLESHOOTING

PROBLEM

CAUSE

SOLUTION

 

 

 

No power to machine

 

Clean battery cable clamps of any corrosion and

Poor Cable Connection

tighten. Test voltage at points G to B should be from 34

 

 

to 38 VDC.

 

 

With the main power switch turned on, test voltage at

 

Faulty Main Power Switch

points D to B should be from 34 to 38 VDC. If there is

 

no voltage remove leads and check switch for

 

 

 

 

continuity. Replace if necessary

Pad motor won’t run

Circuit breaker has tripped

Reset circuit breaker (H).

 

 

With main power on, pad lowered to floor, switch bar

 

Actuator Safety Switch

pulled up, test voltage at L (wire #2) to B (rear panel)

 

should be 34 to 38 VDC. If not, check and adjust or

 

 

 

 

replace safety switch as necessary.

 

 

With main power on, pad lowered to floor and drive

 

 

handle squeezed: Test voltage at points F to B and A to

 

 

B should be from 34 to 38 VDC. When the relay is

 

Faulty Relay

working it should make a clicking noise as the drive

 

 

handle is squeezed. Replace relay if the test voltage F

 

 

to B is OK. If test voltage F to B is not OK, check all

 

 

wiring to pad motor relay.

Deck lift mechanism not

Circuit breaker has tripped

Reset circuit breaker (J).

working

 

 

 

 

With main switch on, test voltage at C (5) to C (2)

 

 

should be 34 to 38 VDC. If not check circuit breaker (J)

Deck switch not working

 

and main power switch. If the test voltage at C (5) to C

 

(2) is 34 to 38 VDC, the voltage at deck switch C (3) to

 

 

C (6) should be 34 to 38 VDC when the deck switch is

 

 

pressed to raise/lower the pad. If not, replace deck

 

 

switch.

Deck actuator not

 

If the deck switch tested OK, but the deck lift actuator

 

still is not working, disconnect the white and black wires

working

 

to actuator (K) and apply 36 VDC directly to actuator. If

 

 

the actuator does not respond, replace actuator.

Handle switch not

 

Check power from E (wire #1) to B. Check switch

working

 

continuity.

Drive Controls

Circuit breaker has tripped.

Check if power at wire #26. If yes, but breaker has no

power at wire 28 either reset breaker (Q) or replace.

 

 

 

 

Check continuity at handle switch for non-traction

 

Bad switch (es).

model. Check continuity at propel switch or pad motor

 

 

switch for traction model. Replace as necessary.

 

Loose connection.

Check all connections of propel circuit especially at M,

 

N, P, R, S & T. Check transaxle connection at U.

 

 

 

 

 

 

 

With the drive motor disconnected at V, test the output

 

 

voltage to the drive motor. The output voltage at V

 

Faulty potentiometer.

should vary from 0 to 36V at R & S as the control lever

 

is squeezed. Resistance of the potentiometer can be

 

 

 

 

tested at the leads 4 & 1 found at the potentiometer T.

 

 

The resistance should vary from 0-50K ohms.

 

 

Voltage at T1 (P) to T2 (N) should be from 34 to

 

Faulty drive control board.

38VDC. If the voltage at T1 is good but the propel

 

motor won't respond, and all the tests above have been

 

 

 

 

done, replace the drive control board.

4-4ENG

86038450 04/12/07

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Windsor L20T, 10027110, 10027100 manual Machine Troubleshooting, Problem Cause Solution
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